Exchange rate between crystalline tripalmitin and liquid triglyceride oil analysed by NMR.
(2003) In Journal of the American Oil Chemists Society 80(12). p.1187-1192- Abstract
- An NMR technique to measure exchange kinetics at thermal equilibrium in dispersions of moderately soluble crystalline material is presented. By monitoring the exchange of molecules between pools in solid and dissolved form, one can characterize the surface specific exchange rate. Illustrative experiments were performed in a model system with b-type crystals of tripalmitin as the solid phase and tripalmitin, a fraction of it deuterated, dissolved in a medium-chain TG oil as the liquid phase. The concentration of deuterated tripalmitin in the solvent was followed by 2H NMR after the crystals, which initially lack deuterated tripalmitin, were immersed in the liquid. The variation of the 2H concentration in the solvent provided the surface... (More)
- An NMR technique to measure exchange kinetics at thermal equilibrium in dispersions of moderately soluble crystalline material is presented. By monitoring the exchange of molecules between pools in solid and dissolved form, one can characterize the surface specific exchange rate. Illustrative experiments were performed in a model system with b-type crystals of tripalmitin as the solid phase and tripalmitin, a fraction of it deuterated, dissolved in a medium-chain TG oil as the liquid phase. The concentration of deuterated tripalmitin in the solvent was followed by 2H NMR after the crystals, which initially lack deuterated tripalmitin, were immersed in the liquid. The variation of the 2H concentration in the solvent provided the surface specific exchange rate. No systematic errors, due to the slight difference in properties of the deuterated tripalmitin compared to hydrogenated tripalmitin, were observed. The methodology worked well between crystal concentrations of 2 and 4 wt%. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/128282
- author
- Löfberg, N ; Smith, Paul ; Furo, Istvan and Bergenståhl, Björn LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- triglyceride., surface exchange, Colloid chemistry, surface chemistry, deuterium NMR dispersion
- in
- Journal of the American Oil Chemists Society
- volume
- 80
- issue
- 12
- pages
- 1187 - 1192
- publisher
- The American Oil Chemists' Society
- ISSN
- 0003-021X
- language
- English
- LU publication?
- yes
- id
- 1e8c67e7-73af-4533-8029-ed9edb6b98fd (old id 128282)
- date added to LUP
- 2016-04-01 11:35:26
- date last changed
- 2021-09-27 04:06:17
@article{1e8c67e7-73af-4533-8029-ed9edb6b98fd,
abstract = {{An NMR technique to measure exchange kinetics at thermal equilibrium in dispersions of moderately soluble crystalline material is presented. By monitoring the exchange of molecules between pools in solid and dissolved form, one can characterize the surface specific exchange rate. Illustrative experiments were performed in a model system with b-type crystals of tripalmitin as the solid phase and tripalmitin, a fraction of it deuterated, dissolved in a medium-chain TG oil as the liquid phase. The concentration of deuterated tripalmitin in the solvent was followed by 2H NMR after the crystals, which initially lack deuterated tripalmitin, were immersed in the liquid. The variation of the 2H concentration in the solvent provided the surface specific exchange rate. No systematic errors, due to the slight difference in properties of the deuterated tripalmitin compared to hydrogenated tripalmitin, were observed. The methodology worked well between crystal concentrations of 2 and 4 wt%.}},
author = {{Löfberg, N and Smith, Paul and Furo, Istvan and Bergenståhl, Björn}},
issn = {{0003-021X}},
keywords = {{triglyceride.; surface exchange; Colloid chemistry; surface chemistry; deuterium NMR dispersion}},
language = {{eng}},
number = {{12}},
pages = {{1187--1192}},
publisher = {{The American Oil Chemists' Society}},
series = {{Journal of the American Oil Chemists Society}},
title = {{Exchange rate between crystalline tripalmitin and liquid triglyceride oil analysed by NMR.}},
volume = {{80}},
year = {{2003}},
}